What Is ACPI (Advanced Configuration and Power Interface)? (minitool.com) read a little bit about it here.
The post you were looking for was just a post to promote a site which wasn't trying to help you with your problem, its a way of spamming.
Your computer will be and have ACPI enabled and you can check by clicking computer in the device manager and I would be surprised if its causing your problem. I think Windows installs those drivers these days automatically so you don't need to look for or find them.
With Bluetooth Audio device can you try it in a friend's computer just to check it works on another computer, if it does maybe the motherboard does have a problem.
Thanks for the links! I'd forgotten about mini tool.
I'm not sure if Asus has a proprietary ACPI or whether it matters. My computer shows a generic "ACPI x64-based PC" but some of the Asus sites I ran across show "Asus ACPI..." I tried to find the driver on Asus, but 🤷♀️ I keep trying to start Bluetooth User Support, but those services simply won't start.
The Device Manager sound, video controller shows Bluetooth 8821 installed and running. I checked all the services. I had a dealer upgrade my RAM, so I'm not sure if that might have caused the problem, I think I might have to take it in to a good repair shop.
Thanks again, Bryce. I'm going to try the BIOS again. just in case I missed something...